Valve-rotating device



W. G. BUCK.

VALVE ROTATING DEVICE.

APPUcATloN F|LED1uNE5,191s.

Patented. Mayv2, 1922.

TN .te

' wrLiuEE. e. BUCK, or EnEMoN'r, NEBRASKA, assrenon To CONTINENTAL ENGINEER- NEBRASKA, A. CORPORATION 0F NEBSis:

VvE-EATING DEVICE.

speciacation of Letters Patent.

Patented May 2, 1922.

Application filed June 5, 1918. Serial No. 238,275. I

.To all who-mult may concern;

Be it known thatl, VVILMER G. BUoK,'a citizen of the United States, residing at Fremont, in the county ofDodge and State of Nebraska, have invented' certainl new and useful Improvements in Valve Rotating Devices, of which the 'following is a specification.

4The present invention relates to ameans for giving a partial rotativel movement to a puppet valvewhile the said valve is moving in one direction, and to allow it to move it in the other direction with a straight line movement.

The general principle involved in the present application is disclosed in my previous Patents No. 1,183,852, May 23, 1916,

valves for gas engines, and No. 1,244,287,

stem will impart a rotative movement thereto. l

A further object of the invention'is to so arrange these clutch surfaces as toxenable them to be made of a substantial and strong character adapted to withstand the strain of use.

A further object of the Vinvention is to enable vthe assemblance of the rotating delvice to the valve without altering in any way the character of the valve stem, utilizing the ordinary valve stem key and slot connection for securing t e rotating device to the stem.`

A further object of the invention is to generally simplify the construction and 'to reduce the cost of production. f

The invention further consits in the features of construction 'and combination of parts hereinafter described and claimed.

In the drawings:

' JFigure 1 isa sectionof ya portion of a gas Figure 3 is a section on line 3--3 of Fig. 2, lookmg 1 n the direction of the arrows;

Figure 4 1s a section on line 4- 4 of Fig. 2,

looking in the direction of the down-point- I invarrows igure 5 1s a sectlon on line 4 4 of Fig.

2, looking in the direction of the up-pointinvarrows; and

lgure 6 is a view looking on ythe lower end of the rotating mechanism.

`Referring now to the drawings, the inventlon is shown in conjunction with a gas englne casing 7 which may be of any suitable style and construction. A piston chamber 8 is shown, in which is located the usual plstgn 9. and from which extendsthepiston rod 10 that connects to the crank shaft (not shown). A cam shaft 11 is illustrated, carrying suitable cam members 12, which operate against a tappet 13 in the usual manner to raise and lower the valve'stem to unseat and seat the valve. Located above the tappet is a valve stem 14 of apuppet valve 15, which valve may be so located as to control either the inlet or exhaust opening. The valve stem 14 is moved up and down by the movements of the tappet and causes the valve member to vseat and unseat in the usual way.

It has been found that the length'of li1e of the valve is increased if a'part-ial rotative movement 1s given to the valve member each time it -is operated, whereby it' is constantly changing its surface with respect to the surface of the seat 16, and the presentinvention 1s directed toward the mechanism for carrying out this rotative action. As explained,v

the mechanism in general is based on the i same principle -as that disclosed in my prior Patents Nos. 1,244,287 and 1,183,852 previously `referred to, and in the present invention there is employed `a bushing 17 vformed with spiral slots 18`extending through'the walls thereof.- This bushing is provided with an upper flanged head 19 formed with a recess 20, the walls of which areaengaged by a pin v21 secured in the cylinder 22. This bushing is therefore held against vany turning movement Traveling within the s lots 18 of the bush-vv ing are lugs or projectlons 23 attached to.

a sleeve 24. 0n the lower end of this sleeve is a flange 25,l and immediately below said flange are a series of clutch teeth 26. Attached to the valve stem is a collar 27,

formed with an upwardly extending neck 28. This collar has an elongated recess 29 in its lower face (see Fig. 6), in which lies a pin 30 extending through a hole in the valve stem. It is obvious from an inspection of Fig. 6 that the key lying Within the recess 29 forms an interlocking connection between n between a flange 41 on the bushing 17 and a flange 38 on the cap the collar 27 and the valve stem 14. The collar 27 is also formed with aball-race 21, and above said collar isa ring 32 formed with a ball-race 33. Bearing members 34 are inserted. in said race, giving a mounting enabling the collar 27 and the valve-stem which is joined thereto to partake easily of a turning movement.

The upper end of the neck 28 isformed with clutch teeth 35, which are complementary to the clutch teeth 26. A locking'ring 36 is secured to the neck 28 with a driving fit and acts to retain the ring 32 in postion; and secured by a driving fit, or otherwise,

to the outerperiphery of the ring 32 is a cap 37 which cap is forme-d with an linwardly extending flange 38 havingopenings 39 therein. A spring 40 is employed, which extends flange 42 on the cap 37. This spring exerts a pressure tending to hold the valve normally downward and in seated position, as in Fi g. 1.

In assembling the device, the sleeve 24 is' inserted through the top opening 37a in the cap 37, the'lugs 23 passing through the ing flange 38 of said cap after Ithe sleeve has been pushed through the opening 37a. When the sleeve has been inserted through the cap, the flange 25 on the lower end of the sleeve will engage with the-under side ,of the 37 thus retaining the cap and sleeve together. The locking ring 36 is then applied to hold the ring 32 and collar 27 together and form the ball-'bearing mounting. The ring 36, ring 3 2 and collar 27 are then insertedupon the valve stemand the cap 37 is driven down onto the ring 32, thus assembling all of the The spring 40 has been previously positioned, and then upon insertlng the pin30 se h that it lies within the recess 29 in the collar 27 the entire appliance is affixed to the valve stem, and such appliance may be removed by merely reversing the steps of the operation above described.

When pressure is applied `to the lower end ofthe valve stem,l the valve is raised, carrying upward the collar 27, ring 32, ring 36 and. cap-piece 37, and acting to start thel compresslon of the spring 40. The teeth f the clutch surfaces 26 and 35 are brought into clutch engagement, so that upon further upward mgo'vement, 'the sleeve 24 is moved upward. This moves the lugs ,23 upward, which are joined to said sleeve, and since'they rest within the spiral slots 18, it

is obvious that the sleeve 24 will be given openings 39 in the upper inwardly extend-- parts together. i

-from the valve stem to the valve' head or member 15, so that upon such upward movement the valve member will be given a par- `tial rotative movement.

When the cam 12 releases from the lower end of the tappet, the spring 40, which has been compressed by the upward movementof the valve. will act to return Ithe parts to normal position and will exert a downward pressure'upon the cap-piece 37, which pres-'- sure is transmitted to the ring 32 'and the collar 27, and by reason of the connection between the collar and valve stem 14, serves to lower the latter and return the valve member to s eated position. Immediately when this downward pressure of the spring is exerted, the clutch surfaces 26 and 35 will be moved out of clutching engagement, since the surface 35 will move with the collar 27 and under the influence of the spring, whereas the surface 26, being attached to the sleeve 24, is not influenced by the spring. This separation of these clutching surfaces will allow the valve stem to return to normal position Without any rotative movement,.and

thus the valve will be rotatedY only wheny the rotator device in the manner described,

the only means necessary to join the valve stem andv said device is the ordinary valve stem key 30, whichis common to all valve constructions. The device can, therefore, be applied to the standard valve without. any change or modification whatsoever in the latter.-

I claim:

1. In a device of the class described, the combination of a reciprocating valve stem avingv a valve member thereon, a sleeve loosely mounted on the stem, a collar connected to the/stem, co-operating clutch surfaces on the adjoining ends of the collar and sleeve", means carried by the *collar and enl gaging said sleeve, v'said means permitting of a' slight separating movement between the aforesaid clutch surfaces, means for imparting an oscillating rotative movement to said sleeve as it is moved up and down, said clutch surfaces engaging upon upward movement of the parts,whereby rotative movement is transmitted from,..said sleeve through said collar and'to the valve stem, a spring vexerting' a pressure on said collar to separate said yclutch surfaces when the valve is moved downward, whereb no rotative movement is imparted to t e valve stem on its downward movement, and said having a valve member thereon, a sleeveloosely mounted on the valve stem, means for imparting an oscillating rotative movement to said sleeve as it moves up and down, a member afixed to the valve stem, a lostmotion connection between adjacent end portions of said memberand sleeve, clutching surfaces on said member and sleeve adapted to engage while the valve is moving in one direction, means for causing their disengagement when the valveis moving 1n the opposite direction, and said connection serving to engage and move said sleeve while the parts are moving in said opposite direction, substantially as described.

3. In a device of the class described, the combination of a reciprocating valve stem having a valve member thereon, a sleeve loosely mounted on said stem, a member affixed to the stem, a cap-piece secured to said affixed member and en aging with said sleeve in amanner to permlt a slight movement vof said sleeve with respect thereto, means for imparting an oscillating rotative movement to said sleeve as it moves up and down, co-operating clutch surfaces on said afiixed member and sleeveadapted to engage when the parts are moving in'one direction, means causing a disengagement of said clutch surfaces when the parts are moving in the opposite direction, and said cappiece engaging and moving`said sleeve durl ing said movement in said opposite direction, substantially as described.

4. In a device of the class described, the combination of a reciprocating valve stem having a valve member thereon, a sleeve loosely mounted on'the stem, a member se- 'cured to the stem by a single locking key, a-g

lost-motion connection carried by said member and engageable with the adj acentend portion of said sleeve, means for imparting an oscillating rotative movement to said sleeve as it moves up and down, means for effecting a clutching connection between said sleeve and secured member when the parts are moving in one direction, means acting to break said clutching connection when the parts are moving in the opposite direction, said connection between said sleeve and secured member constituting means for moving said sleeve subsequent to the release to the clutch engagement, and said key serving as `the sole means for connecting all of the parts to the valve stem, substantially as described.

5. In a device of the class described, the combination of a reciprocating valve stem having a valve member thereon, a sleeve loosely mounted on the stem, a member affixed to the stem, a chambered housingadjacent the lower end of the stem forming a connection between said .member and sleeve and enabling said sleeve to have a slight amount of movement With respect to the affixed member, co-operating clutch surfaces on said member and sleeve, said surfaces coming into engagement when the parts are moving in one direction, means for causing a separation of said surfaces when the parts are moving in' the other direction, and said housing acting as a means for moving said sleeve in said other direction, substantially as described.

6. In a device of the class described, the combination of a reciprocating valve stem having a valve member thereon, a sleeve loosely mounted on said stem, a member affixed to the stem, cooperating clutch surfaces on the adjoining ends of the sleeve and the aflixed member adapted to engage while .the valve is moving in one direction, means for causing their disengagement when the vvalve is moving in the opposite direction,

and a cap secured to the affixed member on the stem and having a lost-motion connection with the loosely mounted sleeve 'for positively moving said sleeve when the clutch surfaces are disengaged.

7. In a device of the class described, the combination of a reciprocating valve stem having a valve member thereon, a sleeve loosely mounted on the stem and having at lone end thereof a fiange,',a member-afiixed to the stem, cooperating clutch surfaces on the adjoining ends of the sleeve and afiixed vmember adapted to engage While the valve A1s movmg 1n one dlrection, means'for causing their ydisengagement when the valve is moving in the opposite direction, and a cap secured to the afixed member on the stem and provided with a fianged end for engagement with `the loosely 'mounted sleeve above the flange on the end thereof to permit a relative longitudinal movement between the affixed member and the loosely mounted sleeve when the clutch surfaces are disen a ed.`

WILMER G. 

